from constants import ORGANIZATION, KEYWORD
from crawler.q import RedisQueue
from settings import REDIS_QUERY_KEYWORD, REDIS_EXCAVATE, REDIS_QUERY_ORGS


class Scheduler:

    def __init__(self, queue=None):
        self.mrq = (queue or RedisQueue())

    def _add_tasks(self, classify: str, tasks, level=1, group='', **kwargs):
        if isinstance(tasks, list):
            _tasks = tasks
        else:
            _tasks = [tasks]

        if classify.lower() == 'query' and group.lower() == KEYWORD:
            redis_key = REDIS_QUERY_KEYWORD
        elif classify.lower() == 'query' and group.lower() == ORGANIZATION:
            redis_key = REDIS_QUERY_ORGS
        elif classify.lower() == 'excavate':
            redis_key = REDIS_EXCAVATE
        else:
            return

        self.mrq.push_task(
            redis_key,
            _tasks,
            level=level,
            disable_debug_log=kwargs.pop('disable_debug_log', False)
        )

    def add_query(self, group, tasks, level=1, **kwargs):
        self._add_tasks('query', tasks, level, group, **kwargs)

    def add_excavate(self, tasks, level=1, **kwargs):
        self._add_tasks('excavate', tasks, level, **kwargs)

    def _get_task(self, classify: str, group=''):
        if classify.lower() == 'query' and group.lower() == KEYWORD:
            return self.mrq.pop_task([REDIS_QUERY_KEYWORD], priority=True)
        elif classify.lower() == 'query' and group.lower() == ORGANIZATION:
            return self.mrq.pop_task([REDIS_QUERY_ORGS], priority=True)
        elif classify.lower() == 'excavate':
            return self.mrq.pop_task([REDIS_EXCAVATE], priority=True)

    def get_excavate_task(self):
        return self._get_task('excavate')

    def get_query_task(self, group):
        return self._get_task('query', group=group)